Rocker replacment

[ff6849]

Guess what I am doing this week-end, replacing a set of Pro-Form rockers with a set of Hughes 1.5 rockers.  Had 100 miles on my new motor bent a push rod and lifter came out of is bore, lost all oil pressure and clanking valve train....Hopefully this will solve/fix my issues

[PlumCraZRT]

Assuming you're using hydraulic lifters, hopefully you've read around to find what adjustments people are using.  I believe 3/4 turn past snug is the winner.  Some have stories of the pushrod jumping out (then possibly bending) if it's tightened to only 1/2 turn past.

[ff6849]

Thanks for  that good info, I know for sure that my push rods were to short I had the adjuster screw almost fully at their maximum adjustment from what I  have gathered  they  only should be one or two threads past the bottom edge of the roller of the rocker arm for a correct length push rod, and the adjustable part of the rocker is for preload only,  which sounds as if it should be 3/4 turn past that. Hughes sent me the adjustable push rod and lifter tool to measure the correct length of the push rod. Hopefully I can get my valve train geometry correct using this as my starting point, the sad thing is I had a very reputable mopar engine builder build my engine too. 

[PlumCraZRT]

Thanks for  that good info, I know for sure that my push rods were to short I had the adjuster screw almost fully at their maximum adjustment from what I  have gathered  they  only should be one or two threads past the bottom edge of the roller of the rocker arm for a correct length push rod, and the adjustable part of the rocker is for preload only,  which sounds as if it should be 3/4 turn past that. Hughes sent me the adjustable push rod and lifter tool to measure the correct length of the push rod. Hopefully I can get my valve train geometry correct using this as my starting point, the sad thing is I had a very reputable mopar engine builder build my engine too.

Agreed.  That's a bummer.  You may consider letting him know you're unhappy with how the pushrods/rockers were put together.

Post up and tell us what the correct length should be and what length you had in there.  I'm curious what the difference in length is.

[oldkimmer]

..............Did u have any warranty........kim......

[ff6849]

one issue is that the motor was done about 5 years ago, thought I would have gotten everything done a little faster, but had two kids going to catholic high school where I coached football and wrestling had a major change in my work schedule....so things got put on hold and with little or time but I am back track with a very flexible work schedule again and both kids are graduated,  so I have the time to get it done